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In order to change the present situation that the traditional axial piston pump can only change flow by controlling the swashplate angle,this paper designs a precision piston pump, introduces in detail its structure and working principle, and uses harmonic gear reducer to improve transmission accuracy and load capacity, and to reduce volume and weight of the system. On this basis, the paper uses the system of parallel piston pump to achieve constant flow output, gives the movement and flow characteristic of double pump, and designs overall scheme and MSP430 MCU hardware system of the control system.

Constant Flow Control of the Parallel Precision Piston Pump